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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25db69e7f91de1c46a274ec8952ed0e9adecbb5f0185fa0ad86e466cbf8f4a6d' 
  AND token = 'qpIywqq3xrPBplqXE/sj+4zm6x7aV1I5J67z4rMWNQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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