SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4a6fcda20e53de7cd3fc23e6dc88d7f1c6493cb88ae5923e59f18e21af4aaa5' 
  AND token = 'i+E5Y7dtH4TKLedUBKcKT2mpigmnhwML9Hi69pR2Q1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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