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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898ae070db67d6f527ab2d8b44f28bc8b37756c229cb7bacef75c1a8598c572b' 
  AND token = 'hhHCI3nHG85ECoZys5CxSFr1a1GFRLEe7Vwf0PCokSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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