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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e754fc2234fe11481cd6cf8944c8061bc792f209b106d9fc735596b23ad1501' 
  AND token = 'KU/Hgsm+7Ku2pJfLnJo0F6HgknoTcz3s+k1tqfS96aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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