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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba4bb2515c3c8cc2cdfe3e40738a491b479e824bf68c4342494e2a038874c160' 
  AND token = 'NJtOpPhmVg1/gm1Uhy1rSiLCjPSC6L95RrUGD5wDHJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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