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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03fae1cc32c8c14b2630be1e853bcf65660ce8c3b53bb2b0b1b27081389e30b7' 
  AND token = 'U1YgHzcvllSWsH7b/bvRLuP89u9rGJbFd4N09Esfpe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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