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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d42cca09f0a593414132e80b1d2e5d2cf88932032af3e3448650f7c51743721' 
  AND token = 'uLXjaWHA5XVEpm9zBTcfjieyI43l9t4NpJfYQQ+8i5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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