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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fde06659cb7cf1497cb4b8a8d20d4c8c8b1268400d8a59a19afca6786126bd06' 
  AND token = 'Om1jIo4nxUI3nSY3utaOhjWbB2rSKZdY2O6lUXbNaEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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