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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af4365c7960e159c51bc9e1c262ecb377056b714a3595fcf081ead9c1219aaca' 
  AND token = 'lbC2KQQpcQ/hlrsWxJo7n8VZ6Ta7qr0JvsxQ3cePa60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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