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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01e4f0f4827d82e9c02a6afa200e5da87215180c941151402686783147643793' 
  AND token = 'CDrjyZB+hEFKW6D2aE7MqF9VHBE9onJHjkqFlcJ2EK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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