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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d6dcd5c0ac45c16298f5a354f94e1b3e0cf30a653d81c91f87a01d3bbf121d' 
  AND token = 'y+lyqZuufH9eHyFw7Yw8oGAF6xWMboBUisOsUWVS20M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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