Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f3238b85aa4c7761ab2193e75bf27796bee4fdb2c4670374c587fba7e735b93' 
  AND token = '1yKUM58F6OHyimNF1lt1WeLHRRlmZsIDebuM1YuwXgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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