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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c65bfede92111e77cecf9c5b6a1320586cad710b399809f5c0e3034c3ebd61b4' 
  AND token = 'n3T4WJWvx7Jun32R8UGQ8d9Ni90jrvW4MNBMesyvQYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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