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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f444dd311e58af9ef1baee4171b78705a35c66af6ad8b05439308672901d967c' 
  AND token = 'pkyGRiGMfGR7vsEKQk5eajvPyUQ50vkJL8IV1naHN0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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