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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '060544bef220bc2bea4f779137ec094400553d81dd61a2ea9754e7ffe05fadfc' 
  AND token = 'oFfwq+P+f0wVLaGyAm555nAU3UvLyjLhxpx2tk5pKfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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