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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c416e9eb5748530d13aadbb49a6a4fb8c5cf75f0a7b4c4054e79dd113c1b9f95' 
  AND token = 'rdAJBsGbK/8OEcmoiLlbPNjmkbs5hAeLAbHQJp5RGcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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