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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7344c686591f4d4cd35fb142024095725a0193c154a9552d40854a7b7675e29' 
  AND token = 'dLeW7zXbks0stcqqrB2G44BaaMiX6v8Rl4jX79gXROA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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