Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d0889fe2f1482ed37fbb2a512e479475546ca77509248227c798dc449dac749' 
  AND token = 'aFPKCSAWjiYZ2DiaNUJcILgFwVy1KidRTbt86yiB6OI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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