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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fac18dad8a093c12c2e847ef6e14eac6fcec3e8c3ca502f1e2cfd2294173d4ef' 
  AND token = 'TPXyRQyFOLuTTT3B+zig4csgn92XrnMCT/VfOwKWKqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}