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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65b4bfa5139a9b03590d9a3ab1a62b68afaa77fcd149ddfb33ee033dc4c7539e' 
  AND token = 'cyq5a65A6q57NedT+l4bA71C/mtd3F6jKu/Vpv5Q+SQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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