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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4111eb51be48480930df7f4fa40874b003d2fdf3a3cce1ef73a5fbe8933bb336' 
  AND token = 'QteAdE9zmMNePllrqJ2rO2MGG9VP2H85dRzJDAkHy1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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