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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10032e4932a80897ad4386c62baa999228ca3cc62e2bbad72629a37daaa58eb0' 
  AND token = 'jZfGVq8V1XzDHpm14DcYb6HNEWXz3bsQxmON1tOp8FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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