Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4faea70e96744970d30c898151cc5a390716781b11108c337a361935a15e6d71' 
  AND token = 'vOBa9CYJhH/mV28rnStd6SMq5pY4xktftMyQ52PbxQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00093

JSON explain

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