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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13007d6ea644a49478a05624aead96a59781f73bf329efbf5e18fac963915720' 
  AND token = '5NUsADNoSp2uhWDQNOG4T/CjmvkoH/EYC83K33Iix18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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