SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17c0f622a2e3e800c694fdd587af2ac9715563ea6abf657a22c7cd237b0631d6' 
  AND token = 'C79Ve/kiBh2j/bpZLZvHXMKXFDHRLptzO8WA1UOZKCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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