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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25fd23d3e5e46d17c7b914ce78b0fabdb37df34e7a9e35ee1f6ef4633b54a35f' 
  AND token = 'tIkYixria+bEGwolE/UtLbHvVv+K+qbpC4OpqPcpdV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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