Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7124003c6e74b831bf3491d198037390a538e1918e677ed1d2d11cc2993f975' 
  AND token = '//KqT3Zbis3F7r6nVhHV+OQ0/juyqyG1bY5S8faXEr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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