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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b558902e76c305331d540073874c9c583a30137eb7b2a867cf55426ba5fda527' 
  AND token = 'yjkxwX2cgURZ/W1ZCRlWCs2yMT3/EM0BMHJ5F/zA9dY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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