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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '862c72f859435309667a3573755e2b02c20e8a4050b2899d92543efa8080c372' 
  AND token = 'N5p9z2IBI2b/JIEa65hQ1+prROUYzfODd1LqQ/d6iaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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