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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e79f793e9f245e789984d860ac20864542df3ce54dd0315493a103392cb3b1b' 
  AND token = 'J9LiI1GNIxE42TtxtgV3a0oe3C35MSZXH7+g6IbDbqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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