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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c44bf9d02800357395c3180bcd8e7d0fa199f7990d926b064c6f8e49c01fb1bf' 
  AND token = 'HNCCYU6EwnXcJloihcWve6ZEHF6GPGoYuQw4O8eezeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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