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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acdd98a67a8bb9069625d5c03ccbb23bc40f4244718ccc65ab41d065c8fc0e4b' 
  AND token = 'qz2zaN11numaxn5O7tc15PMVROfmLZ0wUb89BcLxLUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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