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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '581b511fc6f1ee67a5f98a7baca6404a92d2d910ef8d25bfa3378f872d53fbec' 
  AND token = 'ekBiYuerq5oinUavFmNTarVqeUU4tqE3denimPadoAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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