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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a01c08f470622e24c8829a759b1eabab29f56378431f90fbf30880fbab171d0a' 
  AND token = 'D0w7fTc6jI/mU1YYEG67URrZQgsOrh0L18VqiImQGnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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