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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1294a11d2991c11dbc57a1a8fbf61a81b9b6d39305f49cf657d48c01a2d184f' 
  AND token = '4sojchcGvE7F18XJIW5aR3ArCR32M42agyG7RnQINpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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