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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885bcb5e762ddb11e0673c29bf9f3167bb9fe7c2d4a86e4b30fca5056acd93e6' 
  AND token = 'ZTYLrujJ44PuxxnyKmS72q60UuCMR+ST9X6a+0prcAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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