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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faff1c0bfe52c20be7c483ec424f3b036f0f863490b2899b8193796493e8fd10' 
  AND token = 'Ex92TrSPz0Bx2CmLQ4D64iB2JCFfrjWmUxE47iTKM+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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