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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ace97a8d1550a1e8aa2a0c7233f50f7cde5e5614fbda66a1b34d6d060f1e260' 
  AND token = 'IR7uzFxLXbI28Txf/D8XWgBrhGXrD410CFVMQ+IluzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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