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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33acc60432d9e39ffea0e200ffe10c1b798e59a3f3c13ebbfdf6ff363b8eb395' 
  AND token = 'bhnbCNHMuao6PP/REGVJEj7gY0usjvvgufiG5SrgV3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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