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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd32ff0864eedf2e235e035030b11a38bd86c8b6ca1eb1919146b69a223cc1cb0' 
  AND token = 'AWC+wp5BgsLPN/YIQix8G3i/99a/87K3RgnM1RPEzJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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