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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f049d60624b5f2e1102c0fc95f185b978ae9f0e1979d7c02219b0c04ce694310' 
  AND token = 'g4X6n13bTMOE8ITgDD5jwuCrfVjQic2XCzj02Ywr2bE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}