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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898e96247d231fc6d54302b13115f583d20e3c2ccd9fe5bae3c811b10ed0b1bf' 
  AND token = 'erXeZ38ESCi7sOuNHVQA8JYkI9CK8/YSZgLYKy30Voc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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