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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e47e4fdc85a49a69a16cbadafd84bf315eef1f5f942daf86c9760fe5586e02a' 
  AND token = '24g0qM5BNrEtuYoTK8aIBaGuAIoN0LPwhQP6tBlfZEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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