Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8badb1c734cdf79974d0db99e4548d6cd6923e8cc04b44177521b1f45cf4568c' 
  AND token = 'sG3Givsllp35c5FhXkcDCeNABwKKW9XseEVqGqQhtSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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