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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '791efcbf4b7fe2e2964913f8436497d54cf47e05058b1c71fe64cc1fbe27cab0' 
  AND token = 'hz89Z71YoSNt5pTp2ItervsldXFlOk5ldSt9fLwlXSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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